Vanessa Trump, the wife of the president’s eldest son Donald Jr, was hospitalized after she complained of nausea following her exposure, New York officials said.
“The substance had arrived by mail and it was addressed to Donald Trump Jr,” said New York Police Department spokesman Carlos Nieves.
“Thankful that Vanessa & my children are safe and unharmed after the incredibly scary situation that occurred this morning,” Trump Jr said on Twitter.
Trump Jr has been in the public eye for his role in a 2016 meeting in Trump Tower with a Russian attorney and others after the Trump campaign was offered potentially damaging information about Democratic rival Hillary Clinton.
In 2016, white powder, which also proved harmless, was sent to the home of Eric Trump, Trump Jr’s brother.